Last-modified: 2012-03-30 (金) 12:55:23
- A subset B of topological space (X, τ) is called semi-generalized closed (in short sg-closed) if semi-closure of B s-cl(B) ⊂ U whenever B ⊂ U and U is semi-open in X.
- Bhattacharyya Paritosh, Lahiri B. K., Semigeneralized closed sets in topology., Indian J. Math. 29 (1987), no. 3, 375-382 (1988).